Hydrocarbon generation from Carboniferous-Permian coaly source rocks in the Huanghua depression under different geological processes  

作　　者：Jin-Jun Xu Qiang Jin 

机构地区：[1]Key Laboratory of Deep Oil and Gas,China University of Petroleum(East China),Qingdao 266580,Shandong,China [2]Pilot National Laboratory for Marine Science and Technology,China University of Petroleum(East China),Aoshanwei Wenhai Road 1,Qingdao 266237,Shandong,China

出　　处：《Petroleum Science》2020年第6期1540-1555,共16页石油科学（英文版）

基　　金：supported by the Certificate of National Science and Technology Major Project of the Ministry of Science and Technology of China(2016ZX05006007-004,2016ZX05014);National Natural Science Foundation of China(41702139,U1663204,41602138,41602142);Natural Science Foundation of Shandong Province(ZR2017BD036,ZR2017LD005);Fundamental Research Funds for the Central Universities(18CX02008A)。

摘　　要：Natural gas and condensate derived from Carboniferous-Permian(C-P)coaly source rocks discovered in the Dagang Oilfield in the Bohai Bay Basin(east China)have important implications for the potential exploration of C-P coaly source rocks.This study analyzed the secondary,tertiary,and dynamic characteristics of hydrocarbon generation in order to predict the hydrocarbon potentials of different exploration areas in the Dagang Oilfield.The results indicated that C-P oil and gas were generated from coaly source rocks by secondary or tertiary hydrocarbon generation and characterized by notably different hydrocarbon products and generation dynamics.Secondary hydrocarbon generation was completed when the maturity reached vitrinite reflectance(Ro)of 0.7%-0.9%before uplift prior to the Eocene.Tertiary hydrocarbon generation from the source rocks was limited in deep buried sags in the Oligocene,where the products consisted of light oil and gas.The activation energies for secondary and tertiary hydrocarbon generation were 260-280 kJ/mol and 300-330 kJ/mol,respectively,indicating that each instance of hydrocarbon generation required higher temperature or deeper burial than the previous instance.Locations with secondary or tertiary hydrocarbon generation from C-P coaly source rocks were interpreted as potential oil and gas exploration regions.

关 键 词：Hydrocarbon generation Thermal simulation Coaly source rocks CARBONIFEROUS-PERMIAN Huanghua depression 

分 类 号：TE31[石油与天然气工程—油气田开发工程]